57320820097 has 2 divisors, whose sum is σ = 57320820098. Its totient is φ = 57320820096.

The previous prime is 57320820059. The next prime is 57320820113. The reversal of 57320820097 is 79002802375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55319510401 + 2001309696 = 235201^2 + 44736^2 .

It is a cyclic number.

It is not a de Polignac number, because 57320820097 - 2³⁵ = 22961081729 is a prime.

It is not a weakly prime, because it can be changed into another prime (57320820017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28660410048 + 28660410049.

It is an arithmetic number, because the mean of its divisors is an integer number (28660410049).

Almost surely, 2^57320820097 is an apocalyptic number.

It is an amenable number.

57320820097 is a deficient number, since it is larger than the sum of its proper divisors (1).

57320820097 is an equidigital number, since it uses as much as digits as its factorization.

57320820097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 57320820097 in words is "fifty-seven billion, three hundred twenty million, eight hundred twenty thousand, ninety-seven".